[Pollinosis and use of anti-allergic drugs: ragweed in the Rhone-Alpine region].

Ragweed pollinosis was first described in the middle Rhône valley in the early sixties. Prevalence has increased steadily since that time. The aim of the present study was to determine whether this phenomenon is perceptible in terms of anti-allergic drug sales (eye drops, nasal spray, oral antihistamines) and if so, to compare sales with those related to hay fever. For this purpose, monthly sales in July, August and September were compared between an area of high infestation, a control area and national data for France. The comparisons showed a steep rise in sales for all kinds of anti-allergic drugs related to ragweed pollens, the level being comparable with that observed for gaminaceae. Surprisingly we were unable to find this type of data in the literature despite the evident usefulness of an epidemiological and economical analysis of the progression of pollen allergy.